Litigation And Other Contingencies (Schedule Of Guarantees) (Details) $ in Millions |
Dec. 31, 2019
USD ($)
|
|||
|---|---|---|---|---|
| Loss Contingencies [Line Items] | ||||
| Guarantees | $ 6,955 | |||
| Equity Company Obligations [Member] | ||||
| Loss Contingencies [Line Items] | ||||
| Guarantees | 1,700 | [1] | ||
| Other Third-Party Obligations [Member] | ||||
| Loss Contingencies [Line Items] | ||||
| Guarantees | 5,255 | |||
| Debt-Related Guarantees [Member] | ||||
| Loss Contingencies [Line Items] | ||||
| Guarantees | 931 | |||
| Debt-Related Guarantees [Member] | Equity Company Obligations [Member] | ||||
| Loss Contingencies [Line Items] | ||||
| Guarantees | 827 | [1] | ||
| Debt-Related Guarantees [Member] | Other Third-Party Obligations [Member] | ||||
| Loss Contingencies [Line Items] | ||||
| Guarantees | 104 | |||
| Other Guarantees [Member] | ||||
| Loss Contingencies [Line Items] | ||||
| Guarantees | 6,024 | |||
| Other Guarantees [Member] | Equity Company Obligations [Member] | ||||
| Loss Contingencies [Line Items] | ||||
| Guarantees | 873 | [1] | ||
| Other Guarantees [Member] | Other Third-Party Obligations [Member] | ||||
| Loss Contingencies [Line Items] | ||||
| Guarantees | $ 5,151 | |||
| ||||